I will make some current measurements when I get my Syntakt.
There is a chance that the analog bits are completely disabled until they are used. That would cause the power consumption to change significantly depending on the opened project.
As it was pointed out, the Digitone and Digitakt both have 1A printed on the enclosure. They come with a 2A power supply and they draw about 0.7A in real life.
The Analog Heat MK2 has 2A printed on the enclosure, comes with the same 2A power supply and it draws about 1A.
Of course this is no indication on how much current the Syntakt will draw, but it will probably somewhere between 1 and 2 amps.